<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
           <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
           <el-breadcrumb-item>商品管理</el-breadcrumb-item>
           <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片区域 -->
        <el-card>

            <!-- 提示信息 -->
            <el-alert
            title="添加商品信息"
            type="info"
            centers
            show-icon
            :closable="false">
            </el-alert>

            <!-- 步骤条 -->
            <el-steps :space="200" :active="activeIndex - 0" finish-status="success" style="margin: 15px 0;font-size: 13px" align-center>
              <el-step title="基本信息"></el-step>
              <el-step title="商品参数"></el-step>
              <el-step title="商品属性"></el-step>
              <el-step title="商品图片"></el-step>
              <el-step title="商品内容"></el-step>
              <el-step title="完成"></el-step>
            </el-steps>
            
            <!-- 左侧tab栏 -->
            <el-form 
            :model="addForm" 
            :rules="addRuleForm" 
            ref="addFormRef" 
            label-width="100px"
            label-position="top">
            <el-tabs 
            tab-position="left" 
            v-model="activeIndex"
            :before-leave="beforeTabLeave"
            @tab-click="tabClicked">
              <el-tab-pane label="基本信息" name="0">
                  <el-form-item label="商品名称" prop="goods_name">
                      <el-input v-model="addForm.goods_name"></el-input>
                  </el-form-item>
                  <el-form-item label="商品价格" prop="goods_price">
                      <el-input v-model="addForm.goods_price" type="number"></el-input>
                  </el-form-item>
                  <el-form-item label="商品重量" prop="goods_weight">
                      <el-input v-model="addForm.goods_weight"  type="number"></el-input>
                  </el-form-item>
                  <el-form-item label="商品数量" prop="goods_number">
                      <el-input v-model="addForm.goods_number"  type="number"></el-input>
                  </el-form-item>
                  <el-form-item label="商品分类" prop="goods_cat">
                      <el-cascader
                        v-model="addForm.goods_cat"
                        :options="catelist"
                        :props="cateProps"
                        @change="handleChange">
                      </el-cascader>
                  </el-form-item>
              </el-tab-pane>
              <el-tab-pane label="商品参数" name="1">
              <!-- 渲染表单的item项 -->
              <el-form-item v-for="item in manyTableData" :key="item.attr_id" :label="item.attr_name">
                  <!-- 循坏复选框组 -->
                 <el-checkbox-group v-model="item.attr_vals">
                     <el-checkbox v-for="(cb , i) in item.attr_vals" :key="i" :label="cb" border></el-checkbox>
                </el-checkbox-group>
              </el-form-item>
              </el-tab-pane>
              <el-tab-pane label="商品属性" name="2">
                  <el-form-item 
                  :label="item.attr_name" 
                  v-for="item in onlyTableData" 
                  :key="item.attr_id">
                   <el-input v-model="item.attr_vals"></el-input>
                  </el-form-item>
              </el-tab-pane>
              <el-tab-pane label="商品图片" name="3">
                 <!-- 上传图片 -->
                  <el-upload
                    action="https://www.liulongbin.top:8888/api/private/v1/upload"
                    :on-preview="handlePreview"
                    :on-remove="handleRemove"
                    list-type="picture"
                    :headers="headersObj"
                    :on-success="handleSuccess">
                    <el-button size="small" type="primary">点击上传</el-button>
                  </el-upload>

              </el-tab-pane>
              <el-tab-pane label="商品内容" name="4">
                  <!-- 富文本编辑器组件 -->
                  <quill-editor
                  v-model="addForm.goods_introduce"
                  >
                  </quill-editor>
                  <!-- 添加商品按钮 -->
                  <el-button type="primary" style="margin-top: 15px" @click="add">添加商品</el-button>
              </el-tab-pane>
            </el-tabs>
            </el-form>
        </el-card>
        
        <!-- 图片预览对话框 -->
        <el-dialog
          title="图片预览"
          :visible.sync="previewVisible"
          width="50%"
          >
          <img :src="previewPath" alt="" style="width: 100%">
        </el-dialog>

    </div>
</template>

<script>
import _ from 'lodash'
export default {
    data(){
        return{
            activeIndex: '0',
            // 商品分类列表
            catelist: [],
            // 添加商品表单数据对象
            addForm: {
                goods_name: '',
                goods_price: 0,
                goods_weight: 0,
                goods_number: 0,
                // 商品所属的分类数组
                goods_cat: [],
                // 图像数组
                pics: [],
                goods_introduce: '',
                attrs:[

                ]
            },
            // 表单验证规则
            addRuleForm:{
                goods_name:[
                    { required: true, message: '请输入商品名称',trigger: 'blur'}
                ],
                goods_price:[
                    { required: true, message: '请输入商品价格',trigger: 'blur'}
                ],
                goods_weight:[
                    { required: true, message: '请输入商品重量',trigger: 'blur'}
                ],
                goods_number:[
                    { required: true, message: '请输入商品数量',trigger: 'blur'}
                ],
                goods_cat:[
                    { required: true, message: '请选择分类',trigger: 'blur'}
                ]
            },
            cateProps:{
              expandTrigger: 'hover',
              label: 'cat_name',
              value: 'cat_id',
              children: 'children'
            },
            manyTableData: [],
            onlyTableData: [],
            // 上传图片设置请求头
            headersObj: {
                Authorization: window.sessionStorage.getItem('token')
            },
            previewPath: '',
            previewVisible: false
            
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
        // 获取所有商品分类数据
       async getCateList(){
         const {data:res} = await this.$http.get('categories')
         if(res.meta.status != 200) return this.$message.error('获取数据失败')
         this.catelist = res.data
        },
        // 级联选择器变动触发函数
        handleChange(){
        //   console.log(this.addForm.goods_cat);
          if(this.addForm.goods_cat.length !== 3){
              this.addForm.goods_cat = []
              this.$message.warning('请选择第三级分类')
          }
        },
        beforeTabLeave(activeName,oldActiveName){
            // console.log(activeName);
            // console.log(oldActiveName);
            if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3){
               this.$message.warning('请先选择商品分类')
               return false 
            }
        },
        async tabClicked(){
            if(this.activeIndex === '1'){
                // 访问动态参数页面面板
               const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
                    params: { sel: 'many' }
                })

                if(res.meta.status != 200 ){
                    return this.$message.error('获取参数失败')
                }

                res.data.forEach(item => {
                    item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
                })
                this.manyTableData = res.data
                // console.log(this.manyTableData); 
            }else if(this.activeIndex === '2'){
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
                    params: { sel: 'only' }
                })
                if(res.meta.status != 200 ){
                    return this.$message.error('获取属性失败')
                }
                this.onlyTableData = res.data
                // console.log(res.data);
            }
        },
        // 图片预览
        handlePreview(file){
            this.previewPath = file.response.data.url;
            this.previewVisible = true
        },
        // 移除图片操作
        handleRemove(file){
            const filePath = file.response.data.tmp_path
            const i = this.addForm.pics.findIndex(x => {
                x.pic === filePath
            })
            this.addForm.pics.splice(i,1)
        },
        // 图片上传成功
        handleSuccess(response){
            const picInfo = response.data.tmp_path
            this.addForm.pics.push(picInfo)
        },
        add(){
            this.$refs.addFormRef.validate(async valid => {
                if(!valid) return this.$message.error('请填写必要的表单项目')
                // 转化字符串
                // lodash深拷贝  cloneDeep(obj)
                const form = _.cloneDeep(this.addForm)
                form.goods_cat = form.goods_cat.join(',');

                
                
                // 处理动态参数
                this.manyTableData.forEach(item => {
                    const newInfo = {
                        attr_id: item.attr_id,
                        attr_value: item.attr_vals.join(','),
                    }
                    // console.log(newInfo);
                    this.addForm.attrs.push(newInfo)
                })
                // 处理静态属性
                this.onlyTableData.forEach(item => {
                    const newInfo = {
                        attr_id: item.attr_id,
                        attr_value: item.attr_vals
                    }
                    // console.log(newInfo);
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs = this.addForm.attrs
                // console.log(form);

                const {data:res} = await this.$http.post('goods',form)
                if(res.meta.status != 201) return this.$message.error('添加商品失败')
                this.$message.success('添加商品成功')
                this.$router.push('/goods')
            })
        }
    },
    computed:{
        cateId(){
          if(this.addForm.goods_cat.length === 3){
              return this.addForm.goods_cat[2]
          }
          return null
          
        }
    }
}
</script>

<style lang="less" scoped>
.el-checkbox{
    margin: 0 10px 0 0  !important;
}
</style>